Injection molding head

Abstract

An injection molding head designed to attach to a prior art extruder designed for extruding relatively large slabs of epoxy based adhesive materials, including materials that may be filled with glass beads or fibers. The injection molding apparatus constructed according to the preferred embodiment of the present invention as described utilizes cooler temperatures and lesser internal pressure during the extruding process than does conventional plastic injection molding machines. The preferred embodiment generally includes an outlet end portion having an outlet end opening, an inlet end portion having an inlet end opening, a center member having an inlet passage with an inlet opening and an outlet passage with an outlet opening, and first and second transfer units. The first and second transfer units are disposed opposite the other with the center member therebetween. The center member including a center bore, an inlet passage in fluid communication with the inlet end portion, and an outlet passage in fluid communication with the outlet end portion. The present invention further includes a rotary valve having a rotary member disposed within the center bore of the center member defining a first partitioned area and a second partitioned area. The rotary member having a first flow channel that directs material to the first transfer unit, and a second flow channel that directs material to the second transfer unit. In the preferred embodiment, the inlet opening having an approximate 4-12 square inch cross section; and the outlet opening having an approximate 0.75 inch cross section; and, the internal pressure of extruding the materials is under 2000 psi.

I claim:  
     
         1 . An injection molding head designed for receiving epoxy based adhesive materials from an extruder, and designed to extrude relatively large slabs of said epoxy based adhesive materials into a mold cavity, said injection molding head comprising: 
 an inlet end portion having an inlet opening;    an outlet end portion having an outlet opening;    a center member disposed between first and second transfer units, said center member comprising a center bore, an inlet passage in fluid communication with the inlet end portion, and an outlet passage in fluid communication with the outlet end portion;    wherein the inlet opening having an approximate 4-12 square inch cross section;    wherein the outlet opening having an approximate 0.75 square inch cross section.    
     
     
         2 . The injection molding head as recited in  claim 1 , further comprising a rotary valve, said rotary valve comprising a rotary member.  
     
     
         3 . The injection molding head as recited in  claim 2 , wherein the rotary member rotatably extends within the center bore of the center member defining a first partitioned area and a second partitioned area.  
     
     
         4 . The injection molding head as recited in  claim 1 , wherein the outlet end portion and the inlet end portion is on an axis.  
     
     
         5 . The injection molding head as recited in  claim 3 , wherein the rotary member defining a first flow channel that directs the material to the first transfer unit, and a second flow channel that directs the material to the second transfer unit.  
     
     
         6 . An injection molding head designed for receiving epoxy based adhesive materials from an extruder, and designed to extrude relatively large slabs of said epoxy based adhesive materials into a mold cavity, said injection molding head comprising: 
 a main body portion;    an inlet end portion;    first and second outlet end portions disposed on opposite sides of the main body portion;    said main body portion comprising a center bore, an inlet passage in fluid communication with the inlet end portion, a first outlet passage in fluid communication with the first outlet end portion, and a second outlet passage in fluid communication with the second outlet end portion;    a rotary valve that extends within the center bore of the main body portion defining a first partitioned area and a second partitioned area;    wherein the inlet end portion having an opening, said opening having an approximate 4-12 square inch cross section;    wherein the first and second outlet end portions each having an opening, each of said openings having an approximate 0.75 square inch cross section.    
     
     
         7 . The injection molding head as recited in  claim 6 , wherein the rotary valve defining a first flow channel that directs the material to the first outlet end portion, and a second flow channel that directs the material to the second outlet end portion.  
     
     
         8 . An injection molding head designed for receiving epoxy based adhesive materials from an extruder, and designed to extrude relatively large slabs of said epoxy based adhesive materials into a mold cavity, said injection molding head comprising: 
 a main body portion;    an inlet end portion;    first and second outlet end portions disposed on opposite sides of the main body portion;    said main body portion comprising a center bore, an inlet passage in fluid communication with the inlet end portion, a first outlet passage in fluid communication with the first outlet end portion, and a second outlet passage in fluid communication with the second outlet end portion;    a slide valve comprising a first channel in fluid communication with the first outlet passage, and a second channel in fluid communication with the second outlet passage, said slide valve extends within the center bore of the main body portion defining a first partitioned area and a second partitioned area;    a cylinder attached to the slide valve;    wherein the inlet end portion having an opening, said opening having an approximate 4-12 square inch cross section;    wherein the first and second outlet end portions each having an opening, each of said openings having an approximate 0.75 square inch cross section.    
     
     
         9 . The injection molding head as recited in  claim 8 , wherein the slide valve further defining a first flow channel that directs the material to the first channel, and a second flow channel that directs the material to the second channel.  
     
     
         10 . The injection molding head as recited in  claim 8 , wherein the cylinder is a hydraulic cylinder.